To determine the extractor fan size of your grow room or tent, the formula is to multiply grow room volume(cubic feet), carbon filter factor(+25%), insulation factor(±20%), ducting(+10% for 10 feet) and the light factor(+10% for 1000W). You’ll get the fan size in CFM.
Should I run my exhaust fan in my grow tent all the time?
You need to keep the fans running during the light hours . This will help prevent humidity and heat affect your yield. During the dark hours, keep the fan off after 1 hour. Let the plant flower without any disturbance.
How often should I run my exhaust fan in grow tent?
So, you need to ensure regular air circulation around them 24/7 . Depending on the temperature and humidity, you may schedule the exhaust fans, but the oscillating stand-up or tower fans should always be rolling on.
Does a grow tent need an intake fan?
Larger grow tents can benefit from using passive air intake as well but will require higher CFM exhaust fans . Air intake is only a part of the indoor growing equation. Many factors like grow tent size, grow lights, and inline fans contribute to creating the optimal growing environment.
Where do fans go in a grow room?
Point your air circulators towards a wall or ceiling
Just hang it in the center of a square tent (use multiples in larger areas). If you have any other fan, be very careful to place the fan on the floor and blow air upwards, to ensure the temperatures at the top and bottom of your growing area are more even.
Where do fans go in a grow tent?
Your intake fan or vents should be at the bottom of your tent . Your extractor fan should be high, towards the back of your grow room, on the opposite side of your tent to yout intake fan or vent.
How often should you exchange air in grow room?
Air in your grow area should be exchanged at least every 5 minutes . If you are using a grow tent that is 5′ x 5′ x 6′ this is 150 sq/ft of air. For optimal airflow, you need a filter and fan that can move between 30 and 60 cubic feet per minute (CFM). It is also important to balance the flow in and out of air.
What causes high humidity in grow tent?
The air will hold more water vapor when the temperature in your grow tent is higher. Heat in a grow tent causes the water to move faster through the air , resulting in higher humidity.
Do fans dry out plants?
But many plants – especially tropical ones – don’t work well with dry, cold air on their foliage , so a fan (or worse, an AC unit) will deny your plant of the room temperature and moisture it needs to thrive. ‘
Do Grow Tents need 2 fans?
Place Oscillating Fans in the Grow Room
As you learn how to vent a grow room, keep in mind that your grow room ventilation set up needs two types of fans . Keeps room and leaf temperatures down; smooth and...
Is an intake fan necessary?
You really don’t need intake . The case will draw in all the air it needs passively through the front of the case. You do NOT want exhaust in the front AND back.
Does a sealed grow room need fresh air?
The concept of a sealed room is quite basic; a sealed room is a growing environment where there are no holes or air exchanges to the outdoors or any other room. It doesn’t need to be airtight , however, the closer to airtight the better.
How do I get the airflow in my grow tent?
- Inline Duct Fan (Active Exhaust Fan) Also called an extractor fan, an inline duct fan is used to expel the hot and humid air from inside your grow room or tent. ...
- Duct Tubes. ...
- Carbon Filter. ...
- Factoring in Accessories.
How much fan do I need for a grow room?
To determine the extractor fan size of your grow room or tent, the formula is to multiply grow room volume(cubic feet), carbon filter factor(+25%), insulation factor(±20%), ducting(+10% for 10 feet) and the light factor(+10% for 1000W). You’ll get the fan size in CFM.
Is 60 humidity too high for flowering?
It’s important to lower the humidity levels to 40-50% during this phase. Any humidity level over 60% could potentially damage the plant , which is relying on moisture from the soil to nourish itself.
How do I control the humidity in my Grow Tent?
The best ways to control grow tent humidity are with a good ventilation system and/or a dehumidifier .
How do you control temperature and humidity in a grow tent?
- Increase the total airflow and air exchange in your growing room.
- A simple trick: “lights off” during the day — “lights on” at night.
- When you grow with High Pressure Sodium lights (HPS), consider using a cool tube.
- Install an air conditioning unit (AC’s will also lower humidity levels)
